The LT 1307/LT1307B are micropower, fixed frequency DC/DC converters that operate from an input voltage as low as 1V. First in the industry to achieve true current mode PWM performance from a single cell supply, the LT1307 features automatic shifting to power saving Burst Mode operation at light loads. High efficiency is maintained over a broad 100A to 100mA load range. The LT1307B does not shift into Burst Mode operation at light loads, eliminating low frequency output ripple at the expense of light load efficiency. The devices contain a lowbattery detector with a 200mV reference and shut down to less than 5A. No load quiescent current of the LT1307 is 50A and the internal NPN power switch handles a 500mA current with a voltage drop of just 295mV.